/* * Copyright (c) Contributors, http://opensimulator.org/ * See CONTRIBUTORS.TXT for a full list of copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the OpenSimulator Project nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ using System; using System.Collections; using System.Collections.Specialized; using System.Reflection; using System.IO; using System.Web; using log4net; using Nini.Config; using OpenMetaverse; using OpenMetaverse.StructuredData; using OpenSim.Framework; using OpenSim.Framework.Servers; using OpenSim.Framework.Servers.HttpServer; using OpenSim.Services.Interfaces; using Caps = OpenSim.Framework.Capabilities.Caps; namespace OpenSim.Capabilities.Handlers { public class GetMeshHandler { private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); private IAssetService m_assetService; public const string DefaultFormat = "vnd.ll.mesh"; public GetMeshHandler(IAssetService assService) { m_assetService = assService; } public Hashtable Handle(Hashtable request) { Hashtable ret = new Hashtable(); ret["int_response_code"] = (int)System.Net.HttpStatusCode.NotFound; ret["content_type"] = "text/plain"; ret["keepalive"] = false; ret["reusecontext"] = false; ret["int_bytes"] = 0; string MeshStr = (string)request["mesh_id"]; //m_log.DebugFormat("[GETMESH]: called {0}", MeshStr); if (m_assetService == null) { m_log.Error("[GETMESH]: Cannot fetch mesh " + MeshStr + " without an asset service"); } UUID meshID; if (!String.IsNullOrEmpty(MeshStr) && UUID.TryParse(MeshStr, out meshID)) { // m_log.DebugFormat("[GETMESH]: Received request for mesh id {0}", meshID); ret = ProcessGetMesh(request, UUID.Zero, null); } else { m_log.Warn("[GETMESH]: Failed to parse a mesh_id from GetMesh request: " + (string)request["uri"]); } return ret; } public Hashtable ProcessGetMesh(Hashtable request, UUID AgentId, Caps cap) { Hashtable responsedata = new Hashtable(); responsedata["int_response_code"] = 400; //501; //410; //404; responsedata["content_type"] = "text/plain"; responsedata["keepalive"] = false; responsedata["str_response_string"] = "Request wasn't what was expected"; responsedata["reusecontext"] = false; responsedata["int_lod"] = 0; responsedata["int_bytes"] = 0; string meshStr = string.Empty; if (request.ContainsKey("mesh_id")) meshStr = request["mesh_id"].ToString(); UUID meshID = UUID.Zero; if (!String.IsNullOrEmpty(meshStr) && UUID.TryParse(meshStr, out meshID)) { if (m_assetService == null) { responsedata["int_response_code"] = 404; //501; //410; //404; responsedata["content_type"] = "text/plain"; responsedata["keepalive"] = false; responsedata["str_response_string"] = "The asset service is unavailable. So is your mesh."; responsedata["reusecontext"] = false; return responsedata; } AssetBase mesh = m_assetService.Get(meshID.ToString()); if (mesh != null) { if (mesh.Type == (SByte)AssetType.Mesh) { Hashtable headers = new Hashtable(); responsedata["headers"] = headers; string range = String.Empty; if (((Hashtable)request["headers"])["range"] != null) range = (string)((Hashtable)request["headers"])["range"]; else if (((Hashtable)request["headers"])["Range"] != null) range = (string)((Hashtable)request["headers"])["Range"]; if (!String.IsNullOrEmpty(range)) // Mesh Asset LOD // Physics { // Range request int start, end; if (TryParseRange(range, out start, out end)) { // Before clamping start make sure we can satisfy it in order to avoid // sending back the last byte instead of an error status if (start >= mesh.Data.Length) { responsedata["int_response_code"] = 404; //501; //410; //404; responsedata["content_type"] = "text/plain"; responsedata["keepalive"] = false; responsedata["str_response_string"] = "This range doesnt exist."; responsedata["reusecontext"] = false; responsedata["int_lod"] = 3; return responsedata; } else { end = Utils.Clamp(end, 0, mesh.Data.Length - 1); start = Utils.Clamp(start, 0, end); int len = end - start + 1; //m_log.Debug("Serving " + start + " to " + end + " of " + texture.Data.Length + " bytes for texture " + texture.ID); if (start > 20000) { responsedata["int_lod"] = 3; } else if (start < 4097) { responsedata["int_lod"] = 1; } else { responsedata["int_lod"] = 2; } if (start == 0 && len == mesh.Data.Length) // well redudante maybe { responsedata["int_response_code"] = (int) System.Net.HttpStatusCode.OK; responsedata["bin_response_data"] = mesh.Data; responsedata["int_bytes"] = mesh.Data.Length; responsedata["reusecontext"] = false; responsedata["int_lod"] = 3; } else { responsedata["int_response_code"] = (int) System.Net.HttpStatusCode.PartialContent; headers["Content-Range"] = String.Format("bytes {0}-{1}/{2}", start, end, mesh.Data.Length); byte[] d = new byte[len]; Array.Copy(mesh.Data, start, d, 0, len); responsedata["bin_response_data"] = d; responsedata["int_bytes"] = len; responsedata["reusecontext"] = false; } } } else { m_log.Warn("[GETMESH]: Failed to parse a range from GetMesh request, sending full asset: " + (string)request["uri"]); responsedata["str_response_string"] = Convert.ToBase64String(mesh.Data); responsedata["content_type"] = "application/vnd.ll.mesh"; responsedata["int_response_code"] = 200; responsedata["reusecontext"] = false; responsedata["int_lod"] = 3; } } else { responsedata["str_response_string"] = Convert.ToBase64String(mesh.Data); responsedata["content_type"] = "application/vnd.ll.mesh"; responsedata["int_response_code"] = 200; responsedata["reusecontext"] = false; responsedata["int_lod"] = 3; } } // Optionally add additional mesh types here else { responsedata["int_response_code"] = 404; //501; //410; //404; responsedata["content_type"] = "text/plain"; responsedata["keepalive"] = false; responsedata["str_response_string"] = "Unfortunately, this asset isn't a mesh."; responsedata["reusecontext"] = false; responsedata["int_lod"] = 1; return responsedata; } } else { responsedata["int_response_code"] = 404; //501; //410; //404; responsedata["content_type"] = "text/plain"; responsedata["keepalive"] = false; responsedata["str_response_string"] = "Your Mesh wasn't found. Sorry!"; responsedata["reusecontext"] = false; responsedata["int_lod"] = 0; return responsedata; } } return responsedata; } private bool TryParseRange(string header, out int start, out int end) { if (header.StartsWith("bytes=")) { string[] rangeValues = header.Substring(6).Split('-'); if (rangeValues.Length == 2) { if (Int32.TryParse(rangeValues[0], out start) && Int32.TryParse(rangeValues[1], out end)) return true; } } start = end = 0; return false; } } }